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The non-orientable genus, demigenus, or Euler genus of a connected, non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − k , where k is the non-orientable genus.
A scene from one of the Merseburg Incantations: gods Wodan and Balder stand before the goddesses Sunna, Sinthgunt, Volla, and Friia (Emil Doepler, 1905). In Germanic paganism, the indigenous religion of the ancient Germanic peoples who inhabit Germanic Europe, there were a number of different gods and goddesses.
The genus (sometimes called the demigenus or Euler genus) of a connected non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − g, where g is the non-orientable ...
While Euler's identity is a direct result of Euler's formula, published in his monumental work of mathematical analysis in 1748, Introductio in analysin infinitorum, [16] it is questionable whether the particular concept of linking five fundamental constants in a compact form can be attributed to Euler himself, as he may never have expressed it.
Leonhard Euler (/ ˈ ɔɪ l ər / OY-lər; [b] German: [ˈleːɔnhaʁt ˈʔɔʏlɐ] ⓘ, Swiss Standard German: [ˈleɔnhard ˈɔʏlər]; 15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician, and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of ...
The 18th-century Swiss mathematician Leonhard Euler (1707–1783) is among the most prolific and successful mathematicians in the history of the field. His seminal work had a profound impact in numerous areas of mathematics and he is widely credited for introducing and popularizing modern notation and terminology.
"Cuchulain Slays the Hound of Culain", illustration by Stephen Reid from Eleanor Hull's The Boys' Cuchulain, 1904. A demigod is a part-human and part-divine offspring of a deity and a human, [1] or a human or non-human creature that is accorded divine status after death, or someone who has attained the "divine spark" (divine illumination).
A fragmentary late neo-Assyrian god list appears to consider her and another figure regarded as the wife of Anu, Urash, as one and the same, and refers to "Ki-Urash." [403] Kittum: Bad-Tibira, Rahabu [404] Kittum was a daughter of Utu and Sherida. [405] Her name means "Truth". [405] Kus: Kus is a god of herdsmen referenced in the Theogony of ...